Patent classifications
H
ELECTRICITY
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H04
ELECTRIC COMMUNICATION TECHNIQUE
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H04L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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9/00
Cryptographic mechanisms or cryptographic; arrangements for secret or secure communications; Network security protocols
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H04L9/06
the encryption apparatus using shift registers or memories for block-wise; or stream; coding, e.g. DES systems; or RC4; Hash functions; Pseudorandom sequence generators
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H04L9/0618
Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
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H04L9/0631
Substitution permutation network [SPN], i.e. cipher composed of a number of stages or rounds each involving linear and nonlinear transformations, e.g. AES algorithms
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